Which equations are balanced, and how can the non-balanced ones be balanced? B. ___ H2O + ___ SO3  ___ H2SO4
C. ___ KI + ___ Cl2  ___ KCl + ___ I2
D. ___ NaHCO3  ___ Na2CO3 + ___ H2O + ___ CO2
E. ___ Zn + ___ HCl  ___ ZnCl2 + ___ H2
F. ___ BaCl2 + ___ Na2SO4  ___ BaSO4 + ___ NaCl
G. ___ C3H8 + ___ O2  ___ CO2 + ___ H2O
H. ___ Al + ___ CuCl2  ___ AlCl3 + ___ Cu

what are the two models

explanation:

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.